Problem
Possible cause
Troubleshooting
Switch/router defective
Check operating state via LEDs on
switch/router
Call setup/registration not pos-
sible
Transmitting/receiving antenna
defective
Check antenna
Cable connection defective
Check wiring of antenna(s) incl. antenna
cable
Check internal wiring
Carrier disabled
Check status of carrier in the NMC-511
FaultManager
Carrier incorrectly configured
Check configuration in the NMC-515
ConfigurationManager
Carrier defective
Check status of carrier in the NMC-511
FaultManager and replace as required
No subscriber data available
on the base station
Check status in the NMC-511 FaultMan-
ager and, if necessary, in the NMC-515
ConfigurationManager
License for use not available
Check status in the NMC-511 FaultMan-
ager
Subscriber unknown
Check subscriber configuration in the
NMC-512 SubscriberManager
No authorization for call serv-
ices
Terminal incorrectly configured Check configuration of terminal
Terminal defective
Check terminal
No GNSS signal
GNSS antenna defective
Check antenna
No unobstructed visibility of
the sky
Checking the installation site of the
GNSS antenna
Cable connection defective
Check antenna cable and plug connec-
tions
BSCU/CHU not ready for
operation
Module not correctly inserted
Check seating of the module (completely
inserted and flush with the other mod-
ules)
Check locking mechanism of clips and
engage correctly as necessary
Check mounting screws and tighten as
necessary
Electrical connection to back-
plane defective
Insert module correctly
PSU/PSM defective
‒
with V
AC
power supply
Check PSU/PSM
Troubleshooting
DIB-R5 flexibleTx
84
Operation Manual 90DIBR5flexibleTxOM02 - 1.2